Tree component and map

Need a little help here guys. The concept seems simple but I’m having troubles. I’m building an interactive map using an XML driven Tree component as the source of the navigation. The navigation contains items like hotels, airports, gas stations, etc. I want the user to be able to select an item from the Tree and have the map zoom to that location. The map is just a vector based image within a movieclip. I’m having trouble understanding how I can get the XML Tree items to communicate with my map. I’m thinking it needs to send over x and y coordinates…kind of confused on this one. Any help would be appreciated.